Q:

A) 54 % | B) 64 % |

C) 74 % | D) 84 % |

Answer: B) 64 %

Explanation:

Explanation:

Let the number be x.

Then, ideally he should have multiplied by x by 5/3. Hence Correct result was x * (5/3)= 5x/3.

By mistake he multiplied x by 3/5 . Hence the result with error = 3x/5

Then, error = (5x/3 - 3x/5) = 16x/15

Error % = (error/True vaue) * 100 = [(16/15) * x/(5/3) * x] * 100 = 64 %

Q:

A) Rs. 50.75 | B) Rs. 60 |

C) Rs. 51.25 | D) Rs. 51.75 |

2
61

5
147

1
208

1
168

Q:

A) Rs. 15000 | B) Rs. 12000 |

C) Rs. 13000 | D) Rs. 10000 |

1
413

4
417

2
373

2
652